Irregular periods/ovulation

I have had irregular period since my d&c in August. Well me & my finance are trying again. We just started this month & I am already so paranoid about it. Trying to time everything right. Well my 1st period after my d&c was September 26-29 then 2nd was October 10-12. I'm not sure when I ovulated this last time so idk if I will have a chance at conceiving this cycle. I did have some spotting on October 30th. So I'm hoping maybe this is implantation bleeding? Does this sound right? Period Oct 10-12 & implantation bleeding on the 30th? If so, when could I test?